Mercurial > hg > nginx
annotate src/os/unix/ngx_gcc_atomic_sparc64.h @ 9274:46ecad404a29 default tip
Mail: reset imap tag to empty after authentication attempt.
We need to reset the imap tag to empty after an authentication attempt
completes, otherwise if the next line parsed is incomplete with no tag
(e.g. empty line) then we use the "tag" from the previous buffer which
is now definitely wrong and has been partially overwritten with the most
recently read data (e.g. CRLF).
An example before this patch:
S: * OK IMAP4 ready
C: foobar login a b
S: foobar NO Incorrect username or password.
C:
S:
S: obar BAD invalid command
Then with this patch:
S: * OK IMAP4 ready
C: foobar login a b
S: foobar NO Incorrect username or password.
C:
S: * BAD invalid command
| author | Rob Mueller <robm@fastmailteam.com> |
|---|---|
| date | Wed, 15 May 2024 10:06:00 +0300 |
| parents | 67653855682e |
| children |
| rev | line source |
|---|---|
| 561 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 561 | 5 */ |
| 6 | |
| 7 | |
| 8 /* | |
| 9 * "casa [r1] 0x80, r2, r0" and | |
| 10 * "casxa [r1] 0x80, r2, r0" do the following: | |
| 11 * | |
| 12 * if ([r1] == r2) { | |
| 13 * swap(r0, [r1]); | |
| 14 * } else { | |
| 15 * r0 = [r1]; | |
| 16 * } | |
| 17 * | |
|
4572
67653855682e
Fixed spelling in multiline C comments.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
18 * so "r0 == r2" means that the operation was successful. |
| 561 | 19 * |
| 20 * | |
| 21 * The "r" means the general register. | |
| 22 * The "+r" means the general register used for both input and output. | |
| 23 */ | |
| 24 | |
| 25 | |
| 26 #if (NGX_PTR_SIZE == 4) | |
| 27 #define NGX_CASA "casa" | |
| 28 #else | |
| 29 #define NGX_CASA "casxa" | |
| 30 #endif | |
| 31 | |
| 32 | |
| 33 static ngx_inline ngx_atomic_uint_t | |
| 34 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
| 35 ngx_atomic_uint_t set) | |
| 36 { | |
| 37 __asm__ volatile ( | |
| 38 | |
| 39 NGX_CASA " [%1] 0x80, %2, %0" | |
| 40 | |
| 41 : "+r" (set) : "r" (lock), "r" (old) : "memory"); | |
| 42 | |
| 43 return (set == old); | |
| 577 | 44 } |
| 561 | 45 |
| 46 | |
| 47 static ngx_inline ngx_atomic_int_t | |
| 48 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) | |
| 49 { | |
| 50 ngx_atomic_uint_t old, res; | |
| 51 | |
| 52 old = *value; | |
| 53 | |
| 54 for ( ;; ) { | |
| 55 | |
| 56 res = old + add; | |
| 57 | |
| 58 __asm__ volatile ( | |
| 59 | |
| 60 NGX_CASA " [%1] 0x80, %2, %0" | |
| 61 | |
| 62 : "+r" (res) : "r" (value), "r" (old) : "memory"); | |
| 63 | |
| 64 if (res == old) { | |
| 65 return res; | |
| 66 } | |
| 67 | |
| 68 old = res; | |
| 69 } | |
| 70 } | |
| 563 | 71 |
| 72 | |
| 73 #if (NGX_SMP) | |
| 74 #define ngx_memory_barrier() \ | |
| 75 __asm__ volatile ( \ | |
| 76 "membar #LoadLoad | #LoadStore | #StoreStore | #StoreLoad" \ | |
| 77 ::: "memory") | |
| 78 #else | |
| 79 #define ngx_memory_barrier() __asm__ volatile ("" ::: "memory") | |
| 80 #endif | |
| 611 | 81 |
| 82 #define ngx_cpu_pause() |